Clamping attachment to a device for driving rod elements of low rigidity into the ground
US4776407A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1986 |
| Grant date | Oct 11, 1988 |
| Priority date | — |
| Expiry date | Jul 2, 2006 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D7/20
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A clamping attachment to a device for driving elongated rod elements of low igidity into the ground comprises a housing (1) having a through tapered interior (2) and shoulders (7) on the outer surface. The interior (2) of the housing accommodates two spring-biased wedging elements (3) with slots (4). The slots (4) receive ends of arms (9) secured on the shoulders (7). Interposed between the spring (12) and wedging elements (3) is a washer plate (14). End faces (16, 17) of the wedging elements (3) and washer plate (14) are tapered. Contact surfaces (10, 11) of the slots (4,) and arms (9) are inclined to the longitudinal axis of the clamping attachment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.